WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Re: "ACPI: Unable to start the ACPI Interpreter"

On Tue, Jun 28, 2011 at 03:18:21AM +0800, Liwei wrote:
> On 28 June 2011 03:10, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> >
> > Another glance shows:
> >
> > (2.6.32):
> > [    3.502771] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)
> > [    3.502773] xen: sci override: source_irq=9 global_irq=20 trigger=c 
> > polarity=3
> > [    3.502775] xen: registering gsi 20 triggering 0 polarity 1
> > [    3.502780]   alloc irq_desc for 20 on node 0
> >
> > So it has IRQ 9 mapped to IRQ 20 while in 3.0:
> >
> > [    3.803695] xen: --> pirq=7 -> irq=7
> > [    3.803699] xen: --> pirq=8 -> irq=8
> > [    3.803702] xen: --> pirq=10 -> irq=10
> >
> > we skip over IRQ 9. We should have gotten something like this:
> >
> > [    7.059735] xen_map_pirq_gsi: returning irq 20 for gsi 9
> > [    7.064933] xen: --> pirq=20 -> irq=9
> >
> > But we did not. If you can instrument 'acpi_get_override_irq' to see
> > at which of the numerous 'return -1' it fails  that might narrow down
> > the issue.
> >
> 
> Erm, do you want me to set up some kernel tracing or just add a printk
> to acpi_get_override_irq? My kernel hacking foo is very limited.

Just splash some printk's around there and print out the values of gsi and pins.
Nothing fancy.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>